3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 
Insize 6884-E12, CALIPER/HEIGHT GAGE CHECKER, 0-12″, 6928640358876
$2,753.18
To check calipers and height gages.
Constructed with steel gage blocks.
Size: 0-12″
Accuracy: +/- 200?in.
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